Java 正则表达式高级用法实例详解

import java.util.regex.Pattern;
import java.util.regex.Matcher;
String input = "Hello, my email is example@example.com";
String regex = "\\w+@\\w+\\.com";
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(input);
while (matcher.find()) {
    System.out.println("找到的邮箱: " + matcher.group());
}

String input = "abc1 def2 ghi";
String regex = "\\b(?=\\w*)(?<!\\d)\\w+\\b";
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(input);
while (matcher.find()) {
    System.out.println("匹配的单词: " + matcher.group());
}

String input = "My name is John and I am 30 years old.";
String regex = "name is (\\w+) and I am (\\d+)";
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(input);
if (matcher.find()) {
    System.out.println("姓名: " + matcher.group(1)); // John
    System.out.println("年龄: " + matcher.group(2)); // 30
}

String input = "My name is John and I am 30 years old.";
String regex = "name is (?<name>\\w+) and I am (?<age>\\d+)";
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(input);
if (matcher.find()) {
    System.out.println("姓名: " + matcher.group("name")); // John
    System.out.println("年龄: " + matcher.group("age")); // 30
}

String input = "The quick brown fox jumps over the lazy dog.";
String regex = "brown";
String replacement = "black";
String result = input.replaceAll(regex, replacement);
System.out.println("替换后的字符串: " + result); // The quick black fox jumps over the lazy dog.

String input = "apple, banana; orange: melon";
String regex = "[,;:]\\s*"; // 逗号、分号、冒号及其后可选空格
String[] fruits = input.split(regex);
for (String fruit : fruits) {
    System.out.println(fruit);
}

String input = "Hello World\nhello world";
String regex = "hello";
Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);
Matcher matcher = pattern.matcher(input);
while (matcher.find()) {
    System.out.println("找到的匹配: " + matcher.group());
}

String input = "你好，世界";
String regex = "\\p{Han}+"; // 匹配汉字
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(input);
while (matcher.find()) {
    System.out.println("找到的中文: " + matcher.group());
}